This ultrasonic air humidifier uses advanced ultrasonic technology to produce a fine, cool mist at a whisper-quiet 36dB, making it ideal for bedrooms, offices, and yoga spaces without disturbing work or sleep. The 220ml water tank delivers approximately 50ml per hour of continuous mist for up to 4 hours before automatically shutting off when empty, covering rooms from 215 to 322 square feet. The humidifier features 7 color-changing breathing lights that create a calming atmosphere and automatically turn off after 1 hour, while nano-water molecules help keep skin moisturized and air comfortable. Powered by an included USB cable for convenient portability, this compact humidifier is made from ABS materials and suitable for home, office, or travel use. This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.